Grinding machine



H. BUCKLEY ET AL GRINDING MACHI NE Filed Apr. 8, 1921 3 sheets-sheet 1 Apr. 10, 1923.

\ H. BUCKLEY ET AL GRINDING MACHINE Filed Apr. 8, 1921 5 sheets-sheet 2 ill mwummm H. BUCKLEY ET AL Apr. 10, 1923.

GRINDING MACHINE 5 sheets-sheet 5 Filed Apr. 8, 1921- Patented Apr. 10, 1923.

UNH'ED STATES HARRY BUCKLEY AND RAY BUCKLEY, OF LOUISVILLE, KENTUCKY.

GRINDING MACHINE.

Application filed April 8, 1921.

To all 10. mm it may concern:

Be it known that we, HARRY BUCKLEY and RAY BUOKLEY, citizens of the United States, residing at Louisville, in the county of Jet ferson and State of Kentucky, have invented certain new and useful Improvements in Grinding Machines. of which the following is a specification.

This invention relates to grinding machines and has special reference to a feed grinding machine of the type known as single head grinding mill.

In mills of this class two grinding plates are usually employed one of which is known as the idle plate and the other the driven or active plate. It has been common to regulate the space between these grinder plates by ad. justment from the drive or tail end of the machine.

One principle object of the present-invention is to provide an improved construction of single head grinding mill wherein the adjustment will be effected from the head or delivery end of the machine.

In machines of this character it has been common heretofore, to feed the material by gravity and in some instances there is used a spiral screw conveyor for feeding the mate rial to the plates. Conveyors for such mills have been constructed with a slngle screw thread which produces a very uneven de-.

livery of the material. almost all of the material being delivered from the lowermost point of such conveyor. Consequently the distribution of the unground material to the grinding plates has been defective. The gravity feed is also very defective in the distribution of the material.

A. second important object of the invention is to provide an improved form of screw conveyor which will effectively dlstrlbute the material at spaced points of the grinding plates.

A third important point of the invention is to provide a. novel and improved means for adjusting the plates to and from each other.

A fourth important feature of the invention is to provide an improved adjustment of the plates which will permit the operator to quickly open the plates-for the passage of a foreign substance and replace them again in adjusted position without altering the per manent adjustment desired.

With the above and other objects in View. the invention consists in general of certain Serial No. 459,566.

novel details of construction and combinations of parts hereinafter fully described illustrated in the accompanying drawings, and specifically claimed. it

In the accompanying drawings, like char actors of reference indicate like parts in the several views, and

Figure 1 is aside elevation of a grinding mill constructed in accordance with this in vention.

Figure 2 is a longitudinal median section therethrough.

Figure 8 is a front view of the mill.

Figure 4 is a plan view of the front part of the mill.

Figure 5 is a side elevation of the im proved screw conveyor. a

Figure- 6 is an end view thereof.

Figure 7 is face view of certain gimbal rings used herewith.

Figure 8 is an edge view of the driver or carrier for the active or driven grinder plate.

Figure 9 is a face view of such a carrier.

In carrying out the invention there; is provided a base or housing which is formed in two parts the rear part being indicated at 11 and the front or cover partjbeing inclicated at 12. On the upper front portion of the part ll is located a hopper 13 having its lower end formed as a delivery chute 1d. At the rear of this hopper 13 are spaced bearings 15 in which a shaft 16 is, held by suitable caps 17. On the shaftlG between said caps is a drive pulley 18 so that the device may be belted up for driving.

Located within the delivery or feed chute 14; is a spiral screw conveyor which consists of a triple thread screw 19, the several threads being indicated at 20 and terminat ing, as shown in Figure 6, at 120 apart. This screw projectsslightly outward from the chute 14 towards the front of the machine and immediately outside of the screw is a gimbal ring 21 having a centrally disposed opening 22 showing a continuation of the delivery chute 14. This ring is alsoprovided with an annular rib 23 which rests on an elastic backing or support 24: held by the suitable annular ribs 25 formed on the housing. Surrounding the ring 21 is a second gimbal ring 26 which is provided at diametric pointswith drums orchannels 27 fitting in ribs 28 formed in the side wall of the housing as can be seen from Figure 7.

In the gimbal ring 21 are formed openings 29 so that the screws 30 on which the ring 21 revolves may be used to connect this ring pivotally to the ring 26 at diametrically opposite points, these points being at right angles to .the channels 27.

Fixed on the shaft 16 is a combined driver and spreader having a central body portion 31 and outwardly extending lugs 32. Woreover this driver is provided with bolt holes 33 to receive bolts 34 passing through a driven or active grinder plate 35, as more fully shown and described in our Letters Patent No. 1,424,615, dated August 1, 1922. Similarly securing bolts (not shown) pass through openings on bolt holes 36 in the gimbal ring 21. and secured to this ring an idle grinder plate 37. It will be noted that each of these grinder plates has a centrally disposed opening 38 and that these openings show a continuation of the opening 24 in the gimbal ring 2].. The driver and spreader 31 is provided with a conoidal projection 39 which passes through the openings 38 and terminates adjacent the delivery end of the conveyor 19. Thus when material is fed outward by the conveyor it passes through the opening in the gimbal ring 21 and the opening in the idle plat-e37 and is spread by the projection 39 being thus delivered in a substantially even manner all around the inner edge or eye of the grinding plates.

In order to adjust the shaft longitudinally and thereby regulate the'space between the grinding plates there is provided at one side of the housing, this portion being previously called the head, a pair of eyes 40 between which is pivoted one end of a yoke 41 by means of a bolt 42. This yoke has a suitable opening in its opposite end which sets off a stub 43 threaded on its outer end. Surrounding this stub outside of the yoke is a coil spring 44 the tension of which may be adjusted by means of a hand wheel 45, the latter being locked in position. by a suitable lock nut 46. The central portion of the yoke 41 i's provided with a screw thread opening and through this opening extends the threaded portion 47 of a stub shaft having on its front end an operating handle 48 fixed thereto whereby the stub shaft may be screwed in or out through the yoke. At the rear end of the stub shaft there is provided a suitable recess to receive a ball bearing 49 which surrounds the reduced end 50 of the shaft 16, this reduced end projecting outward from the head 12. This ball bearing engages the shoulder formed by this reduced end and consequently by screwing up on the hand wheel 54 and increasing the tension of the spring 44 the plate 35 will tend to move toward the plate 37 and any effort to separate them will be resisted. At the same time should it become necessary to quickly release the adjustment thus obtained this may be done by rotating the stub shaft by means of the handle 48. As this handle is being turned in an anti-clockwise direction the ball hearing will be drawn outward away from the head 12 and consequently the shaft will be found to move slightly forward thus separating the plates and permitting any foreign substance which may be caught to drop through. By again screwing up on the handle 48 the parts are brought back quickly to their original or permanent adjustment.

, At the front of the head there is provided a suitable opening 51 constituting a hand hole and normally covered by a plate 52, which plate may be swung to one side to afford access to the interior of the head.

In the operation of the device the material to be ground is simply dumped into the opening. It will thenbe fed through the eye of the machine by the spiral conveyor, ground between the plates and dropped down to the bottom of the housing. A suitable chute, not forming part of the machine, may lead off to any'desired point from this housing.

There has thus been provided a simple and highly efficient construction for single head grinding mill.

It is obvious that minor changes may be -made in the form and construction of the invention without departingfrom the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is

1. In a grinding machine, a housing, a conveyor chute having a delivery opening at one end, a grinder plate adjacent said delivery opening and having an opening centrally disposed and registering with the delivery opening, a screw arranged to rotate in said chute and having its threaded ends at the delivery openingevenly spaced whereby to deliver material to the plate, means supporting the plate and having an inner flange opening forming a conveyor tube from the end. of said screw to the opening in the plate, said supporting means con1- prising an outer ring pivoted at diametrically opposite points to the housing, an inner gimbal ring pivoted at diametrically opposite points at right angles to the first mentioned pivoted points of the outer ring, said inner ring comprising an outer peripheral part whereto the pivots are connected, and an inner peripheral part of substantially the same diameter as the opening in the grinder plate whereby said inner part forms a continuation of said opening, a second grinder plate cooperating with the first grinder plate, and means to rotate the screw and second grinder plate.

2. In a grinding machine, a housing, an

to move said drive shaft longitudinally and operably from the exterior of the housing and a live movable plate carried by said spider, said spider having a substantial conical portion extending into the cent 111 opening of the inner gimbal ring,

Intesthnony whereof We a'fiix our signatures.

HARRY BUCKLEY. RAY BUCKLEY. 

